EP1796913B1 - Document de securite dote d'un element de visualisation a commande electrique - Google Patents

Document de securite dote d'un element de visualisation a commande electrique Download PDF

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Publication number
EP1796913B1
EP1796913B1 EP05784993A EP05784993A EP1796913B1 EP 1796913 B1 EP1796913 B1 EP 1796913B1 EP 05784993 A EP05784993 A EP 05784993A EP 05784993 A EP05784993 A EP 05784993A EP 1796913 B1 EP1796913 B1 EP 1796913B1
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EP
European Patent Office
Prior art keywords
display element
security document
document according
layer
solar cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP05784993A
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German (de)
English (en)
Other versions
EP1796913A2 (fr
Inventor
John Anthony Peters
Wayne Robert Tompkin
Andreas Schilling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OVD Kinegram AG
Original Assignee
OVD Kinegram AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by OVD Kinegram AG filed Critical OVD Kinegram AG
Publication of EP1796913A2 publication Critical patent/EP1796913A2/fr
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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1677—Structural association of cells with optical devices, e.g. reflectors or illuminating devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/23—Identity cards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/01—Testing electronic circuits therein
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/20—Testing patterns thereon
    • G07D7/202—Testing patterns thereon using pattern matching
    • G07D7/207—Matching patterns that are created by the interaction of two or more layers, e.g. moiré patterns
    • B42D2033/46—
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/153—Constructional details
    • G02F1/157—Structural association of cells with optical devices, e.g. reflectors or illuminating devices

Definitions

  • the invention relates to a security document, in particular a banknote or a badge, which has a carrier and a multilayer flexible film body applied to the carrier, which provides one or more optical security features.
  • EP 1 134 694 A1 It's over EP 1 134 694 A1 It is known to print on a sheet or a strip of paper an electronic circuit of organic semiconductor material, which is connected via a conductor track to a metal strip of a banknote.
  • the electronic circuit is not based on electronic components constructed from conventional semiconductor materials, but on organic field-effect transistors in polymer semiconductor technology.
  • the metal strip serves as an antenna, via which a communication between the semiconductor circuit with a corresponding evaluation circuit is possible. In order to If the electronic circuit can be used to detect counterfeits, locating the document is also possible.
  • WO-03/057502 also shows the state of the art.
  • the invention is based on the object of specifying an improved security document.
  • a security document comprising a carrier and a multilayer film body applied to the carrier, in which the multilayer film body has an electrically controlled display element for generating an optical security feature with associated electrical power source for operating the display element in combination with an optically effective diffractive structure
  • a transfer film for applying a multilayer flexible film body, which provides one or more optical security features, to a support of a security document, wherein the transfer film has a carrier film and a transfer layer forming the multilayer film body, and the multilayer film body has an electrically controlled display element for generating an optical security feature with associated electrical power source for operating the display element in combination with an optically effective diffractive structure.
  • An optically variable element, an electrically controlled display element and a power source are integrated into a preferably flexible, multilayer film body and then applied to the carrier, which is preferably made of a paper material.
  • the optically variable element is in this case integrated into the electrically functional structure of the multilayer film body, so that these elements mutually secure and thus forgery or imitation of the provided by the film body optical security features is reliably prevented. In this case, manipulation is prevented all the more, the more the optical effects generated by the electrically controlled element and the optical effects generated by the optically variable element intermesh.
  • the electrically controlled display element and the diffractive structure overlap at least in regions, so that the visual appearance of the optical effect generated by the diffractive structure is at least partially influenced by the electrically controlled display element.
  • the visual appearance of the optical effect for example a hologram, generated by the diffractive structure can be influenced by the electrically controlled display element.
  • the electrically controlled display element is a light-emitting display element and the diffractive structure alters the radiation behavior of this display element.
  • the electrically controlled display element can be further overlaid by another optically active microstructure, for example a matt structure or a refractive microstructure, for example a microlens structure.
  • microstructures are in particular structures whose lateral dimensions are in the 100 ⁇ m range or smaller.
  • the diffractive structure in at least regional coverage with the electric current source.
  • these mutually form an integral unit so they can not be separated from one another and offer a particularly high degree of security against manipulation.
  • the electric current source is preferably a solar cell.
  • a solar cell By using a solar cell, it is possible to provide obvious optical security features by means of the electrically controlled display element without the interposition of further active electronic components. In this way, security documents according to the invention can be manufactured particularly inexpensively.
  • a solar cell for example, a printed battery or an antenna structure for coupling high-frequency electromagnetic radiation as a power source.
  • information can be checked by means of a mobile device.
  • the (diffractive) microstructure preferably leads light from a surface area of the solar cell surrounding the solar cell or increases the local efficiency of the solar cell.
  • the solar cell supplied radiant energy is increased and superimposed on the visual appearance of the solar cell and the area surrounding the solar cell with an optically variable, decorative effect.
  • the (diffractive) microstructure may be arranged above and / or below the active medium of the solar cell in order to increase the efficiency of the solar cell. If an antireflection structure, for example a moth-eye structure, is arranged over the solar cell, then 4% Fresnel reflection can be eliminated and thus the efficiency of the solar cell can be increased. If an optically active cross lattice, e.g.
  • the efficiency of the solar cell can be improved by the coupling of a portion of the transmitted through the active medium of the solar cell light into the active medium of the solar cell. Furthermore, in this way it is also possible for the user to be able to change the optical effect generated by the electrically controlled display element by covering one or more of the feeding areas. Furthermore, this makes it possible that the solar cell can be optically covered in a wide range and can thus be "hidden" from the observer and that the solar cell is still supplied with sufficient amounts of radiant energy.
  • the diffractive structure preferably has both the function of concentrating radiation energy on the solar cell and simultaneously providing the function of providing an optically variable security element to the viewer in the area of the solar cell.
  • the solar cell is not in a conventional technical / functional form, for example rectangular, executed, but is shaped in the form of a pattern or an image that fits into the "design" of the security element.
  • the solar cell has thus beside the purely electrically-functional function of the conversion of radiant energy into electrical energy continues to function as an optical security feature that shows the viewer, for example, special image information.
  • the solar cell it is possible for the solar cell to be partially overprinted in pattern form and thus serve as background area of an optical security feature of the security document.
  • the diffractive structure is arranged adjacent to the electrically controlled display element, so that the optical effects generated by the electrical display element and the optical effects generated by the diffractive structure provide complementary information. The viewer is thus immediately apparent any change or manipulation of one or the other element, whereby the security against counterfeiting is further improved.
  • the display element has, for example, an organic light-emitting diode which is shaped in the form of a pattern or a number.
  • the display element thus provides a light of a particular wavelength in the form of a pattern or a number-emitting structure.
  • the display element it is possible for the display element to have an electrochromic element which is shaped in the form of a pattern or a number.
  • the display element thus provides a structure that shows a pattern or a number of different colors depending on the applied voltage.
  • the display element can have a multiplicity of differently colored and differently charged particles, which are arranged movably between two electrode layers. By applying a voltage between the electrode layers, the concentration of one or the other particles in the vicinity of the one or the other electrode layer can be changed, so that the visual impression of the display element changes depending on the applied voltage or depending on the polarity reversal.
  • the display element can be individualized.
  • the display element can be individualized, for example in the form of a serial number, an image or a name, for example by means of a corresponding formed overpressure, by laser ablation or by local transfer of layers by means of a transfer film.
  • the security document has a transparent window and the display element is arranged in this transparent window.
  • the display element and the diffractive structure overlaying the display element can be visible both from the front side and from the back side of the security document and furthermore also to have recognizable security features only in the case of transmitted light observation. It is particularly advantageous here to use an electrically controlled display element whose viewing impression differs with respect to the front and back.
  • the flexible multilayer film body further comprises an electronic circuit constructed of organic semiconductor devices that controls the display element.
  • the electronic circuit has, for example, a resonant circuit which controls a flashing of the display element or other effects, such as a "running light” effect.
  • the electronic circuit is superimposed here at least in regions by an optically active diffractive structure which provides an optical security feature.
  • the electronic circuit can be made visible or invisible by the use of suitable materials for the viewer.
  • metallic electrode layers can be generated in the same process step as optically active metallically reflecting layers.
  • the layer structure of the flexible multi-layered film body is characterized by a replication lacquer layer with a molded, diffractive optical active relief structure for generating a diffraction-optical security feature and two or more electrical functional layers of an electrically controlled display element.
  • the multilayer film body preferably has at least one electrical functional layer made of an organic film Semiconductor material on.
  • the multilayer film body preferably consists of the transfer layer of a transfer film, for example a hot stamping film, which is applied to the carrier of the security document, which is preferably made of a paper material.
  • a further increase in the security against counterfeiting is achieved in that the flexible multilayer film body containing the electrically controlled display element and an adjacent area of the security document after application are provided with a common, largely opaque pattern-shaped overpressure and thus the limits of the applied multilayer film body for the viewer optically resolved.
  • the flexible multi-layer film body in addition to diffractive optically acting optical variable elements also other, different optical effects generating optically variable elements.
  • the film body has a thin film layer system for producing viewing angle-dependent color changes, an aligned and crosslinked liquid crystal layer for generating polarization effects or cholesteric liquid crystal layers for producing viewing angle-dependent color shift effects.
  • optically variable elements are preferably superimposed with the electrical components of the multilayer film body or integrated into these.
  • Fig. 1 and Fig. 2 show a security document 1 in the form of a banknote.
  • the security document 1 consists of a carrier 10 made of a paper material which has approximately a thickness of 100 ⁇ m.
  • the carrier 10 is printed on both sides with colored imprints 11 and 12, for example by means of offset printing. Such a printing could also be dispensed with or the carrier 10 could only be printed after application of the film body 2 with the imprints 11 and 12.
  • This imprint is exemplary in Fig. 1 shown, where the numbers "1" and "2" are executed here in green.
  • a flexible film body 2 On the printed carrier 10 is further applied by a transfer method, a flexible film body 2.
  • the carrier 10 pre to application of the film body 2, to provide the carrier 10 with a lacquer layer or a primer layer in the region to which the film body 2 is to be applied.
  • the film body 2 by means of a hot embossing process on the in Fig. 1 indicated area of the Security document 1 applied.
  • the film body 2 is then partially overprinted with a print 25, for example by means of Intaglio printing.
  • the security document 1 is an identification document or a passport.
  • the carrier 10 consists for example of a mechanically stable plastic film or a plastic laminate, for example of polycarbonate.
  • one or more further plastic layers can be applied to the film body 2 and optionally via the print 25, which act, for example, as a protective layer.
  • the film body 2 can be surrounded on both sides by further film layers which act as protective layers and increase the service life.
  • the film body 2 may be laminated between two polycarbonate carrier layers.
  • the flexible film body 2 has a display element 21, an electronic circuit 22 electrically connected to the display element, a solar cell 23 and an optically variable element 24.
  • the optically variable element 24 is a diffractive security element, for example a hologram or Kinegram ®.
  • the optically variable element 24 it is also possible for the optically variable element 24 to consist of a thin film layer system integrated in the film body 2 or a crosslinked and oriented layer of its (cholesteric) liquid crystal material.
  • further optically variable elements it is also possible for further optically variable elements to be integrated in the film body 2, which are preferably integrated into the film body 2 in the area of the solar cell 23, the electronic circuit 22 and the display element 21.
  • the security document 1 still has other optical security features. It is thus possible, for example, for a security thread or watermark to be introduced into the carrier 10, or for the imprint 11 of the imprint 12 or the foil body 2 to be provided with an imprint of an effect pigment, for example a liquid crystal pigment or an interference layer pigment.
  • an effect pigment for example a liquid crystal pigment or an interference layer pigment.
  • Fig. 3 shows a plan view of the flexible multilayer film body 2 with the formed in the form of the number 5 display element 21, the electronic circuit 22, the solar cell 23 and the optically variable element 24.
  • the film body is opaque in the region of the display element 21, the solar cell 23, the electronic circuit 22, the electrical connections leading from the electronic circuit 22 to the display element 21 and to the solar cell 23 and in the region of the optically variable element 24 remaining area transparent, so that in the remaining area the graphic design of the imprint 11 remains visible to the viewer.
  • the imprint 25 is printed in the region of the solar cell 23 on the film body 2, so that the optical appearance of the solar cell 23 as in Fig. 1 shown by the imprint 25 is changed. On the imprint 25 can also be dispensed with.
  • the film body 2 forms the transfer layer of a Fig. 4 Sectionally shown transfer sheet 3, which consists of a carrier film 31, a release layer 32 and the film body 2.
  • the carrier film 31 consists of a PET film of a thickness of 10 .mu.m to 100 .mu.m, which is preferably stretched mono-axially or bi-axially, in order to minimize the distortion of the carrier film in the further manufacturing process.
  • the release layer 32 is then applied, which preferably consists of a waxy material.
  • a lacquer layer 33 having a thickness of 0.5 ⁇ m to 5 ⁇ m, preferably from 1 ⁇ m to 2 ⁇ m, is applied by means of a printing method.
  • the lacquer layer 33 is a transparent protective lacquer layer.
  • a replication lacquer layer 34 is then applied to the layer 33.
  • the replication lacquer layer 34 consists of a thermoplastic or crosslinked polymer into which a diffractive structure 24 is replicated by means of a replication tool under the action of heat and pressure in the region 26 and in the region of the optically variable element 24.
  • a thermoplastic Replizierlack means of a Deep-pressure grid roller over the entire surface applied to the protective lacquer layer 33, dried and then embossed the diffractive structure 42 in the above-mentioned area by means of an embossing die.
  • a radiation-crosslinkable lacquer to be applied to the protective lacquer layer 33 as a replication lacquer and for the diffractive structure 42 then to be shaped into the replication lacquer layer by means of UV replication.
  • an optical separation layer 35 is then applied to the replication lacquer layer 34.
  • the optical separation layer 35 may be a resist layer having a significantly different refractive index with respect to the replication resist layer 34.
  • the optical separation layer 35 is preferably an HRI or LRI (High Refraction Index) layer made of a suitable dielectric, for example LiO 2 or ZnS (for HRI) or MgF 2 (for LRI).
  • the electrode layer 36 is applied to the film body and patterned.
  • the electrode layer 36 is in this case in the region of the display element 21 in the form of in Fig. 3 No. 5 "structured there and consists of a transparent, electrically conductive material, for example indium tin oxide or an electrically conductive polymer, preferably polyaniline or polypyrrole.
  • a transparent, electrically conductive material for example indium tin oxide or an electrically conductive polymer, preferably polyaniline or polypyrrole.
  • the electrode layer 36 is already applied in a structured manner to the optical separating layer 35 by means of a printing method, for example if the electrode layer 36 consists of an electrically conductive polymer. Furthermore, it is possible for the electrode layer 36 to be applied over the whole area to the film body lying underneath, and then to be removed again in regions by means of positive / negative etching or laser ablation, so that the electrode layer 36 in the region of the display element 21 is the one in FIG Fig. 3 Form shown receives.
  • the patterned electrode layer 36 does not only provide the Function of an electrode for the display element 21, but has the necessary structuring to simultaneously form an electrode layer of the electronic circuit 22 and the solar cell 23 and the electrical connection paths between the corresponding electrode layers of the display element 21, the electronic circuit 22 and the solar cell 23 produce.
  • the optical separation layer 35 in the region of the display element 21 can also be omitted if the refractive index between the electrode material and the replication lacquer is correspondingly high or a thin partially transparent metal layer is used as the electrode layer.
  • the electrode layer 39 here consists of a thin, reflective metal layer, for example of copper, silver, aluminum or gold.
  • OLED Organic Light Emitting Diode
  • the semiconductor layers 38 and 39 are preferably applied by means of a printing process. Furthermore, it is also possible to apply only one layer of an electroluminescent polymer, for example PPV or POLY (9,9'-dioctylfluorene) in a thickness of approximately 150 nm between the anode and the cathode. Further details of the structure of organic light-emitting diodes and the materials that can be used for these are, for example WO 90/13148 refer to.
  • the solar cell 23 is in this case preferably realized as an organic solar cell layer.
  • a solar cell consists of a layer of a conjugated polymer, for example PPV-poly (para-phenylenevinylene), which is arranged between a transparent electrode layer, for example the electrode layer 36, and a metallic electrode layer, for example the electrode layer 39.
  • the thickness of the organic semiconductor layer is in this case usually between 10 and a few 100 nm.
  • Such a solar cell consists for example of a single pigment layer, a layer of a donor and a layer of an acceptor (pigment / pigment or polymer / polymer) or of a mixture of donors and acceptors (pigment / pigment, polymer / polymer or polymer / ink ).
  • DSSC DSSC solar cells
  • a plurality of further structured layers consisting of organic insulating materials, for example polyvinylphenol, organic semiconductors, for example polythiophene and / or metallic or organic electrode materials, for example polyaniline, polypyrrole or doped polyethylene, are preferably applied to the structured electrode layer applied in a thickness of 0.5 .mu.m to 1 .mu.m. These materials may in this case be applied in liquid form, in dissolved form or as a suspension and then solidified by drying or otherwise.
  • organic field effect transistors, resistors and capacitors formed that provide the desired operation, such as the operation of an oscillator.
  • a reflection layer is applied to the diffractive relief structure replicated in this area in the layer 34.
  • the reflective layer is preferably a thin metal layer, for example, around the electrode layer 39.
  • a protective lacquer layer 40 and an adhesive layer 41 are applied to the resulting film body composed of a plurality of different structured layers.
  • the adhesive layer 41 is preferably a layer of a thermally activatable or radiation-crosslinkable adhesive.
  • Fig. 4b shows a transfer film 4 with the carrier film 31, the release layer 32, the resist layer 33, the transparent electrode layer 36, the electroluminescent polymer layer 38 and the electrode layer 39.
  • the electroluminescent polymer layer can in this case also by a layer system with two or more layers or a mixture of several Materials exist.
  • the electrode layer 39 is not a structured reflective metal layer, but rather a layer of a transparent conductive material, for example of indium-tin oxide, or of a lattice-shaped and thus transparent-appearing metal layer.
  • the replication lacquer layer 34 into which the diffractive structure 42 is molded is then applied to the transparent electrode layer 39.
  • a reflective layer 43 preferably a reflective metal layer or a reflection-enhancing layer, for example, the layer 35 after Fig. 4 , applied.
  • the display element 21 if it is arranged in a transparent window formed in the carrier 10, to be able to emit light both in the direction of the front side and in the direction of the rear side of the security document.
  • the adhesive layer 41 is after Fig. 4a applied.
  • both the diffractive structure provided in the region 26 of the display element 21 and the diffractive structure provided in the region of the optically variable element 24 are molded so that the replication lacquer layer 34 preferably covers the overlying electrical functional layers of the display element 21 over the full area electronic circuit 22 and the solar cell 23 covers and protects against manipulation.
  • the diffractive structure formed in the region 26 of the display element is preferably a structure that generates a diffraction pattern, for example a hologram or a kinegram. If the organic light-emitting diode forming the display element 21 is supplied with energy, the hologram / Kinegram® lights up in the color determined by the composition of the electroluminescent polymers of the layer 38 or layers 38 and 39. According to the embodiment Fig. 4a In this case, by setting a small refractive index difference between the layers 34 and 35, it is possible for the hologram / Kinegram® to become visible only when energy is supplied to the organic light-emitting diode forming the display element 21.
  • a diffraction-optically effective structure which specifically influences the radiation behavior of the light emitted by the organic light-emitting diode.
  • a blaze grating which directs the light emitted by the organic light emitting diode in a certain direction. So is it is possible for the display element to appear very bright when viewed from the normal viewing direction and to be dimly lit when the security document is rotated 180 °.
  • Refractive and diffrative elements can in this case be combined with one another in the region 26 of the display element 21 in order to achieve the desired radiation behavior.
  • the embodiments of the figures Fig. 4a and Fig. 4b miteinender to combine and provide in the film body 2, both a Replizierlack Mrs with a molded diffractive structure above the electrical functional layers and such a Replizierlack Mrs with molded diffractive structure below the electrical functional layer.
  • This further increases protection against manipulation.
  • this also gives rise to the possibility of producing interesting effects, especially when viewing through transmitted light.
  • the display element when arranged in the region of a transparent window of the carrier 10 in the direction of the front and the back of the security document 1 by the different design of the respective diffractive structures facing the viewer shows different visual appearances.
  • an organic light emitting diode As a display element 21, it is also possible to provide an electrochromic element as a display element. Such an electrochromic element changes color as soon as a voltage is applied.
  • the construction of the display element 21 and the use of an electrochromic element will be described below by way of example with reference to FIG Fig. 4c clarified.
  • Fig. 4c shows a transfer film 5, which consists of the carrier film 31, the release layer 32 and the transfer layer 50.
  • the transfer layer 50 detects the protective lacquer layer 33, the replication lacquer layer 34 with the diffractive structure 42 molded into it, the optical separation layer 35, the protective layer 40 (optional) and the adhesive layer 41 Fig. 4a on.
  • layers 51 to 55 in the region of the display element 21 in FIG Fig. 3 structured form shown superimposed, forming an electrochromic element.
  • the layers 51 and 55 are transparent, electrically conductive electrode layers, for example, those with respect to the electrode layer 36 after Fig. 4a described materials are used.
  • the central layer 53 is made of a polymeric electrolyte or aqueous metal oxide.
  • the layers 52 and 54 adjoining the layer 53 consist of an electrochromic layer or of an ion-storing layer.
  • the electrochromic polymer for example, poly (3,4-ethylenedioxythiophene), PEDOT with poly (styrenesulfonate) PSS can be used, by which a color change from a transparent state to a dark blue state can be realized.
  • the ion-storing layer for example, a nanocrystalline titanium oxide layer can be used.
  • a display element 21 a layer structure in which differently colored and differently charged particles are arranged movably between two electrode layers, whereby the concentration of one or the other particles in the direction of one electrode or in the direction of the other electrode Applying a voltage to the electrode pair can be changed.
  • An embodiment of the use of such a display element for the display element 21 is shown in FIG Fig. 4d shown:
  • Fig. 4d shows a transfer film 6 with the carrier film 31, the release layer 32 and the transfer layer 60.
  • the transfer layer 60 comprises the protective lacquer layer 33, the replication lacquer layer 34 with the molded diffractive structure 42, the optical separation layer 35, the protective lacquer layer 40 and the adhesive layer 41 Fig. 4a on.
  • Between the layers 35 and 40 are in the region of the display element 21 in the in Fig. 3 shown patterned electrode layers 61 and 66 and an intermediate layer 62 are provided with microcapsules 63, each containing black colored, positively charged particles 64 and white colored, negatively charged particles 65.
  • the electrode layers 61 and 66 are made of a transparent, conductive material, for example one of the with respect to the electrode layer 36 after Fig. 4A described materials.
  • the microcapsules 63 preferably have a diameter of less than 100 microns. They are each filled with a clear liquid in which the positively and negatively charged particles 64 and 65 can move freely. Depending on the charge of the electrodes 61 and 66 thus appears the top of the microcapsule white and the bottom black or vice versa.
  • the support structures which effect the spacing of the layers 61 and 66 from each other by means of the replication lacquer layer 34, which then has a thickness in the region of the support structures of the diameter of the microcapsules (for example 80 ⁇ m).
  • a relief profile is introduced into the replication lacquer layer 34 by means of UV replication.
  • microcapsules instead of the use of microcapsules, it is also possible to provide by microstructuring the layer 62 microspheres below the capacity of the human eye, in each of which the above-described positive and negative charged particles 64 and 65 are provided. It is also possible that these particles are not colored in black and white color, but for example in two contrasting colors and thus an alternating colored impression is generated depending on the applied voltage.
  • a liquid crystal based display element for the display element 21.
  • a bi-stable uses reflective cholestic LC material which, when using a black background, shows a color change between a black and a colored state. Since such displays do not require a polarizer, preferably structured ITO layers are used as electrode layers. In order to control the thickness of the layer, for example 15 ⁇ m, a structured spacer layer is applied between the two electrode layers, in which case the cholesteric LC material is introduced.
  • the cholesteric material here may consist, for example, of 60% by weight of E7, 10% of CE2 and 20% of CB15 from Merck, which is then mixed with a UV-crosslinkable monomer, for example NOA65 from Norland in a ratio of 85:15.
  • a UV-crosslinkable monomer for example NOA65 from Norland in a ratio of 85:15.
  • the diffractive structure 42 after Fig. 4a or Fig. 4b to be arranged in the region of the solar cell 23.
  • This functional structure may in this case be part of the design of an optically variable element, the matt structure may, for example, form the background region of an optically variable element which shows a filigree guilloche pattern: the filigree lines of the guilloche occupy only a small part of the surface of the solar cell 23 and hardly influence the energy efficiency of the solar cell 23.
  • the guilloche is hereby preferably realized by means provided on the film body 2 overpressure.
  • Fig. 5a shows a film body 70 with an electrically controlled display element 71, an electronic circuit 72 and a photoconductive region 73 with a solar cell.
  • the film body 70 forms the transfer layer as in the figures Fig. 4a and Fig. 4b structured transfer film 7, which consists of a carrier film 74, a release layer 75 and the film body 70 forming transfer layer.
  • the film body 70 has a protective lacquer layer 76, a replication lacquer layer 71 with a shaped relief structure 84, an optical separation layer 78, a second replication lacquer layer 82 with a shaped relief structure 85 and a second optical separation layer 83.
  • a spacer layer 86 and in the central area a - already at Fig. 4a described - organic solar cell element 87 consisting of two structured electrode layers 79 and 81 and an intermediate photoactive layer 80 is provided.
  • the photoactive layer 80 may be a single layer or a multilayered layer system.
  • the optical spacer layer 86 is made of a material having a refractive index significantly different from the refractive index of the material of the replication resist layer 71, the optical separation layer 78 may also be omitted.
  • the optical separation layer 83 is preferably a reflective layer, for example a full-surface opaque metal layer.
  • Fig. 5a and Fig. 5b illustrates, through the relief structures 84 and 85, the incident light in the solar cell element 87 area incident light through the special, in Fig. 5b clarified design of the relief structures 84 and 85 directed in the direction of the organic solar cell element 87, so that the radiant energy supplied to this element increases.
  • the solar cell element 87 is completely printed with a pattern or over the entire surface, covered by an overlying reflective optically variable element, for example a Kinegram ®.
  • the resulting structures thus provide both the function of the light supply to the solar cell element 87 and also generate an optically variable effect, which serves as a further security feature for the viewer.
  • Fig. 6a shows the security document 1 with the display element 21, the electronic circuit 22, the partially overprinted solar cell 23 and the optically variable element 24.
  • the numbers “1" and “2" are printed in green.
  • the display element 21 shaped in the form of the number "5" and implemented as an organic light-emitting diode glows in blue color when it is not activated.
  • the optically variable element is in the region of Display element 21 is arranged as described above, visible even when not activated state of the organic light emitting diode.
  • the organic light emitting diode is activated and emits red light, so that the figure "5" as in Fig. 6B indicated, red lights up.
  • the electronic circuit 22 controls the organic light-emitting diode in such a way that the number "5" flashes.
  • Fig. 7a and Fig. 7b describe the visual appearance of a security document 9, which also according to the FIGS. 3 to 5c is designed.
  • Fig. 7a shows the security document 9, which has a display element composed of three separately controlled electrochromic elements 91, 92 and 93, an electronic circuit 95, a solar cell 96 and an optically variable element 98. These elements are integrated in a flexible film body 90 which, as described above, is applied to the printed carrier of the security document 9 by means of a transfer film.
  • the solar cell is here in the form of the country France formed and forms a design element of the security document 9.
  • the solar cell 96 is further provided with an optically variable element 97, a Kinegram ®, superimposed.
  • a Kinegram ® 91 is arranged in regions 94 of the display element, and thus superimposed on both the display element 91 and the solar cell 96th
  • the electrochromic elements 91, 92 and 93 are not activated and all appear in the same blue color.
  • the electrochromic elements 91, 92 and 93 are activated and appear as in Fig. 7b indicated, in different colors.
  • one or more of the elements 91 to 93 not as an electrochromic element but as an organic light-emitting diode, so that, for example, the number "5" flashes red with bright illumination.
  • Fig. 8a and Fig. 8b illustrate the visual appearance of a security document 100, wherein Fig. 8a a section of the front of the security document 100 and Fig. 8b a section of the back of the security document 100 shows.
  • a multilayer flexible film body 101 is applied, which has a solar cell 104, an electronic circuit 105 and in the region of an oval shaped out of the support of the security document 100 transparent window 101 arranged display element.
  • the display element is here according to Fig. 4d configured, wherein the electrode layers 61 and 66 each consist of two pairs of electrodes. The one electrode pair is formed in the shape of the character "$" and in which one area 103 is provided, and the other electrode pair is formed in the shape of the surrounding area 102.
  • the solar cell 104 is also here with an optically variable element 106, preferably a Kinegram ® superimposed.
  • the electrode pairs of the display element are covered with a mutually polarized voltage, so that on the front of the in Fig. 8a shown viewing impression results and on the back of in Fig. 8b shown viewing impression results.
  • the electronic circuit 105 changes the polarity of the two pairs of electrodes at regular intervals, so that the symbol "$" appears alternately in white against a dark background or in a dark against a white background.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electrochemistry (AREA)
  • Accounting & Taxation (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Business, Economics & Management (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Finance (AREA)
  • Credit Cards Or The Like (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Road Signs Or Road Markings (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Claims (23)

  1. Document de sécurité, en particulier un billet de banque ou un passeport, avec un support (10) et un corps de film flexible multicouches (2, 70, 90, 101) appliqué sur le support, qui délivre un ou plusieurs caractères de sécurité
    caractérisé en ce que
    le corps de film multicouches flexible (2, 70, 90, 101) présente un élément de visualisation (21, 71, 91, 92, 93, 102, 103) à commande électrique servant à générer un caractère de sécurité optique avec une source de courant électrique (23, 73, 96, 104) afférente servant à faire fonctionner l'élément de visualisation en combinaison avec une structure diffractée à effet optique (24, 42, 84, 85, 96, 98, 106), sachant que l'élément de visualisation présente un élément électrochrome (91, 92, 93), qui est démoulé en forme de motif ou de chiffre ou bien l'élément de visualisation présente un grand nombre de petites pièces (64, 65) colorées et différemment chargées qui sont disposées entre deux couches d'électrodes (61, 66).
  2. Document de sécurité selon la revendication 1
    caractérisé en ce que
    la structure diffractée (42)et/ou une microstructure est superposée, du moins en partie, à l'élément de visualisation (21, 91) à commande électrique et l'apparence optique de l'effet d'optique généré par la structure diffractée et/ou la microstructure est commandée par l'élément de visualisation à commande électrique.
  3. Document de sécurité selon la revendication 1 ou la revendication 2
    caractérisé en ce que
    l'élément de visualisation à commande électrique est un élément de visualisation produisant de la lumière et en ce que la structure diffractée modifie la diffusion de l'élément de visualisation.
  4. Document de sécurité selon la revendication 1 ou la revendication 2
    caractérisé en ce que
    la structure diffractée (84, 97, 106) est superposée, du moins en partie, à la source de courant électrique (73, 96, 104).
  5. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    la source de courant électrique (23, 73, 96, 104) est une cellule solaire.
  6. Document de sécurité selon la revendication 5
    caractérisé en ce que
    la structure diffractée (84, 85) et/ou une microstructure conduit de la lumière provenant d'une partie de surface entourant la cellule solaire (87) vers la cellule solaire ou augmente le degré d'efficacité de la cellule solaire.
  7. Document de sécurité selon la revendication 6
    caractérisé en ce que
    la structure diffractée conduisant la lumière à la cellule solaire délivre aussi un caractère de sécurité optiquement reconnaissable.
  8. Document de sécurité selon l'une des revendications 5 à 7
    caractérisé en ce que
    la cellule solaire (96) est démoulée sous la forme d'un motif ou d'une image et est parfaitement ajustée au design alentours imprimé du support.
  9. Document de sécurité selon la revendication 1,
    caractérisé en ce que
    la cellule solaire (23) est partiellement superposée à la forme du motif
  10. Document de sécurité selon la revendication 1,
    caractérisé en ce que
    la structure diffractée est contigüe à l'élément de visualisation.
  11. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    le corps de film multicouches flexible et une zone contigüe du document de sécurité sont pourvus d'une surimpression commune en grande partie opaque et conçue selon la forme du motif.
  12. Document de sécurité selon la revendication 11,
    caractérisé en ce que
    la surimpression conçue selon la forme du motif contient une information individualisée.
  13. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    l'élément de visualisation est partiellement surimprimée selon la forme du motif, sachant que la surimpression contient de préférence une information individualisée.
  14. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    l'élément de visualisation est pourvu d'une information individualisée à l'aide d'une ablation au laser
  15. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    l'élément de visualisation (21, 71) présente une diode lumineuse organique qui est démoulée en forme de motif ou de chiffre.
  16. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    Le document de sécurité présente une fenêtre transparente (101) et en ce que l'élément de visualisation est (102, 103) est placé dans la fenêtre transparente.
  17. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    la structure diffractée est placée au-dessus d'un circuit de commutation électronique constitué d'éléments semi-conducteurs organiques, lequel commande l'élément de visualisation.
  18. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    le corps de film multicouches présente une batterie ou une capacité de réserve d'énergie.
  19. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    le corps de film multicouches flexible (2, 4, 5, 6, 7) présente une couche de laque de réplique avec une structure à relief (42) démoulée, à effet optique de diffraction servant à générer un caractère de sécurité à effet optique de diffraction et deux couches de fonction électrique ou plus d'un élément de visualisation à commande électrique.
  20. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    Le corps de film multicouches présente au moins une couche de fonction électrique en matériau semi-conducteur organique.
  21. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    Le support (10) est en matériau en papier
  22. Document de sécurité selon l'une des revendications précédentes
    caractérisé en ce que
    Le corps de film multicouches (2, 30, 60, 70) est appliqué comme couche de transfert d'un film de transfert (3, 4, 5, 6, 7) sur le support.
  23. Film de transfert (3, 4, 5, 6, 7) servant à appliquer un corps de film multicouches flexible (2, 30, 60, 70) qui délivre un ou plusieurs caractères de sécurité optiques sur un support (10) d'un document de sécurité, en particulier un billet de banque ou un passeport, sachant que le film de transfert (3, 4, 5, 6, 7) présente un film porteur (31, 74) et une couche de transfert formant le corps de film multicouches (2, 30, 60,70)
    caractérisé en ce que
    le corps de film multicouches (2, 30, 60, 70) présente un élément de visualisation à commande électrique (21, 71, 91, 92, 93, 102, 103) servant à générer un caractère de sécurité optique avec une source de courant électrique (23, 73, 96, 104) afférente servant à faire fonctionner l'élément de visualisation en combinaison avec une structure diffractée (24, 42, 84, 85, 96, 98, 106) à effet optique de diffraction, sachant que l'élément de visualisation présente un élément électrochrome (91, 92, 93) qui est démoulé en forme de motif ou de chiffre, ou que l'élément de visualisation présente un grand nombre de petites pièces (64, 65) à la coloration différente et au chargement différent, lesquelles sont placées entre deux couches d'électrodes (61, 66).
EP05784993A 2004-09-17 2005-09-15 Document de securite dote d'un element de visualisation a commande electrique Active EP1796913B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004045211.3A DE102004045211B4 (de) 2004-09-17 2004-09-17 Sicherheitsdokument mit elektrisch gesteuertem Anzeigenelement
PCT/EP2005/009920 WO2006029857A2 (fr) 2004-09-17 2005-09-15 Document de securite dote d'un element de visualisation a commande electrique

Publications (2)

Publication Number Publication Date
EP1796913A2 EP1796913A2 (fr) 2007-06-20
EP1796913B1 true EP1796913B1 (fr) 2009-10-28

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US (1) US8387886B2 (fr)
EP (1) EP1796913B1 (fr)
JP (1) JP2008513861A (fr)
CN (1) CN100513200C (fr)
AT (1) ATE446846T1 (fr)
AU (1) AU2005284288B2 (fr)
CA (1) CA2580332C (fr)
DE (2) DE102004045211B4 (fr)
DK (1) DK1796913T3 (fr)
ES (1) ES2335516T3 (fr)
TW (1) TWI389057B (fr)
WO (1) WO2006029857A2 (fr)

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DE102004045211B4 (de) 2015-07-09
TW200620163A (en) 2006-06-16
CA2580332A1 (fr) 2006-03-23
EP1796913A2 (fr) 2007-06-20
ES2335516T3 (es) 2010-03-29
US20080035736A1 (en) 2008-02-14
CN100513200C (zh) 2009-07-15
DK1796913T3 (da) 2010-03-08
JP2008513861A (ja) 2008-05-01
AU2005284288B2 (en) 2010-02-25
TWI389057B (zh) 2013-03-11
US8387886B2 (en) 2013-03-05
WO2006029857A3 (fr) 2006-06-22
CA2580332C (fr) 2013-07-02
AU2005284288A1 (en) 2006-03-23
WO2006029857A2 (fr) 2006-03-23
ATE446846T1 (de) 2009-11-15
CN101022959A (zh) 2007-08-22
DE102004045211A1 (de) 2006-03-30
DE502005008421D1 (de) 2009-12-10

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